Welcome to the forum.
You said the plug was broken, was any of it left in the cylinder?
The plug wire could have been damaged. If you still have the old wire try it. If that doesn't fix it then try another of the old plugs.
'03 Dodge Ram 1ton, Cummins diesel, 6 speed manual, 4x4, SRW, quad cab, short box
'04 Town & Country mini van, 3.3 v-6, no ABS